创建支付订单并且完成支付

编写WxController.java

@PostMapping("/nativePayOrder")
@ApiOperation("native付款")
public R nativePayOrder(@RequestBody PayOrderForm form, @RequestHeader HashMap header) {
    ValidatorUtils.validateEntity(form);
    String token = header.get("token").toString();
    Long userId = Long.parseLong(jwtUtils.getClaimByToken(token).getSubject());
    int orderId = form.getOrderId();
    UserEntity user = new UserEntity();
    user.setUserId(userId);
    QueryWrapper wrapper = new QueryWrapper(user);
    long count = userService.count(wrapper);
    if (count == 0) {
        return R.error("用户不存在");
    }

    OrderEntity order = new OrderEntity();
    order.setUserId(userId.intValue());
    order.setId(orderId);
    order.setStatus(1);
    wrapper = new QueryWrapper(order);
    count = orderService.count(wrapper);
    if (count == 0) {
        return R.error("不是有效的订单");
    }
    //验证购物券是否有效
    //验证团购活动是否有效

    order = new OrderEntity();
    order.setId(orderId);
    wrapper = new QueryWrapper(order);
    order = orderService.getOne(wrapper);
    //向微信平台发出请求，创建支付订单
    String amount = order.getAmount().multiply(new BigDecimal("100")).intValue() + "";

    try {
        WXPay wxPay = new WXPay(myWXPayConfig);
        HashMap map = new HashMap();
        map.put("nonce_str", WXPayUtil.generateNonceStr()); //随机字符串
        map.put("body", "订单备注");
        map.put("out_trade_no", order.getCode());
        map.put("total_fee", amount);
        map.put("spbill_create_ip", "127.0.0.1");
        map.put("notify_url", "https://127.0.0.1/test");
        map.put("trade_type", "NATIVE");
        String sign=WXPayUtil.generateSignature(map,key);
        map.put("sign",sign);
        Map<String, String> result = wxPay.unifiedOrder(map);
        String prepayId = result.get("prepay_id");
        String codeUrl=result.get("code_url");
        if (prepayId != null) {
            order.setPrepayId(prepayId);
            UpdateWrapper updateWrapper = new UpdateWrapper();
            updateWrapper.eq("id", order.getId());
            orderService.update(order, updateWrapper);
            return R.ok().put("codeUrl", codeUrl);
        } else {
            return R.error("支付订单创建失败");
        }
    } catch (Exception e) {
        e.printStackTrace();
        return R.error("微信支付模块故障");
    }
}